42788159 has 2 divisors, whose sum is σ = 42788160. Its totient is φ = 42788158.

The previous prime is 42788149. The next prime is 42788173. The reversal of 42788159 is 95188724.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42788159 - 2²⁰ = 41739583 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42788129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21394079 + 21394080.

It is an arithmetic number, because the mean of its divisors is an integer number (21394080).

Almost surely, 2^42788159 is an apocalyptic number.

42788159 is a deficient number, since it is larger than the sum of its proper divisors (1).

42788159 is an equidigital number, since it uses as much as digits as its factorization.

42788159 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 44.

The square root of 42788159 is about 6541.2658560863. The cubic root of 42788159 is about 349.7635382404.

The spelling of 42788159 in words is "forty-two million, seven hundred eighty-eight thousand, one hundred fifty-nine".